I thought I'd give google translate a workout... time consuming on a touch-pad mouse but you can draw in Japanese characters... down the left hand side... (like that wasn't obvious) キャブレタ Carburetor well that was easy... the rest, some of it gets lost in the translation... 型式 Model BDST28 刻印 Engraved Mark 3LN-00 ベンチュリ径 Venturi diameter 26.5 mm メインジェット Main jet carby 1/4 #102.5 carby 2/3 #100 メインノズル Main Nozzle N-8 ジェットニードル Jet Needle 5CT7 ク リ ッ プ 段 数 Clip number of stages carby 1/4 clip #3 of 5 carby 2/3 clip #3.5 of 5 メインェアジェット Main air jet #130 バイロットスクリュ戻し回数 Pilot screw turns out 2 (translates to "count back pilot screw") バイロットジェット Pilot jet #30 スタータジェット Starter jet #105 油面高さ Fuel level フュ工ルレべル (like “level refers off line engineering” ) 9.2 mm アイドリング回転数 Idling rotation speed 1600 rpm アイドリング時吸入負圧 Inhalation negative pressure idling 140 mm Hg/1600 rpm 標 凖 C O 濃 度 Concentration of C O Target Parameter 3.5-4.5% @1600 rpm note the different main jets and needle clip positions... between the two outer carburetors and the inner ones... the main jets only come into operation when the piston lifts the needle out of the nozzle, the 5CT7 needles only have 5 clip cutouts (there are no 1/2 increments) and the nylon spacers and circlips are all the same thickness though the parts listing list different part numbers for the needle assembly for 1/4 3LN-1490J-00 and 2/3 3LN-1490J-10, so there must be some difference... any how... these subtle changes affect the fuel burn in the two outer/cooler cylinders off idle, a) for smoother more efficient running and b) to meet pollution standards of the day..
bwahahahaha... yeah... ok... I typed in english, fuel level, float level, fuel height and none of these translated to 油面高さ because it actually says "oil level", considering petrol is refined from oil, I guess it's technically correct...
